diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f925e9ef..0ecb2e526 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Changed integration tests to work with secure and unsecure opensearch ([#488](https://github.com/opensearch-project/opensearch-go/pull/488))
 - Moved functions from opensearch/internal/test to internal/test for more general test uses ([#488](https://github.com/opensearch-project/opensearch-go/pull/488))
 - Changed custom_foldername field to pointer as it can be null ([#488](https://github.com/opensearch-project/opensearch-go/pull/488))
+- Changed cat indices Primary and Replica field to pointer as it can be null ([#488](https://github.com/opensearch-project/opensearch-go/pull/488))
 ### Deprecated
 ### Removed
 ### Fixed
diff --git a/opensearchapi/api_cat-indices.go b/opensearchapi/api_cat-indices.go
index b1b9152e8..30939cbe3 100644
--- a/opensearchapi/api_cat-indices.go
+++ b/opensearchapi/api_cat-indices.go
@@ -51,8 +51,8 @@ type CatIndexResp struct {
 	Status             string `json:"status"`
 	Index              string `json:"index"`
 	UUID               string `json:"uuid"`
-	Primary            int    `json:"pri,string"`
-	Replica            int    `json:"rep,string"`
+	Primary            *int   `json:"pri,string"`
+	Replica            *int   `json:"rep,string"`
 	DocsCount          *int   `json:"docs.count,string"`
 	DocDeleted         *int   `json:"docs.deleted,string"`
 	CreationDate       int    `json:"creation.date,string"`